toolbox_component_error_telemetry_summary_29_06_2026.md

DevTools Toolbox Error Analysis - Component (React) Errors

Period: 2026-04-10 07:25 to 2026-06-28 23:51 Total Errors: 422

Overview

The analysis reveals 422 component (React) errors, with the most common error being 'TypeError' (64.7%). 95.7% occur on release. Windows users account for 74.6% of all errors.

Platform Distribution

• Windows: 315 errors (74.6%)
• Linux: 67 errors (15.9%)
• Darwin: 40 errors (9.5%)

Channel Distribution

• release: 404 errors (95.7%)
• aurora: 13 errors (3.1%)
• default: 4 errors (0.9%)
• beta: 1 errors (0.2%)

Error Breakdown by Category

1. TypeError in ConsoleSettings - 158 errors (37.4%)

Component:

• Primary: ConsoleSettings

Error location:

get doc@resource://devtools/client/framework/toolbox.js:616:5

Affected:

• Channels: release (156), default (1), aurora (1)
• Platforms: Windows (118), Linux (38), Darwin (2)

2. TypeError in EvaluationContextSelector - 40 errors (9.5%)

Component:

• Primary: EvaluationContextSelector

Error location:

get name@resource://devtools/client/fronts/targets/worker.js:35:5

Affected:

• Channels: release (39), aurora (1)
• Platforms: Windows (24), Darwin (11), Linux (5)

3. TypeError in HTMLPreview - 33 errors (7.8%)

Component:

• Primary: HTMLPreview

Error location:

maybeCancelContentJSExecution@resource://gre/modules/RemoteWebNavigation.sys.mjs:41:5

Affected:

• Channels: release (33)
• Platforms: Windows (23), Darwin (10)

4. InternalError in ResponsePanel - 26 errors (6.2%)

Component:

• Primary: ResponsePanel

Error location:

parseJSON@resource://devtools/client/netmonitor/src/utils/request-utils.js:719:51

Affected:

• Channels: release (22), aurora (4)
• Platforms: Windows (21), Linux (4), Darwin (1)

5. undefined in RequestListContentComponent - 23 errors (5.5%)

Component:

• Primary: RequestListContentComponent

Affected:

• Channels: release (23)
• Platforms: Windows (20), Linux (2), Darwin (1)

6. TypeError in MenuButton - 16 errors (3.8%)

Component:

• Primary: MenuButton

Error location:

UNSAFE_componentWillReceiveProps@resource://devtools/client/shared/components/menu/MenuButton.js:135:17

Affected:

• Channels: release (16)
• Platforms: Windows (13), Darwin (3)

7. undefined in Connect(MonitorPanel) - 13 errors (3.1%)

Component:

• Primary: Connect(MonitorPanel)

Affected:

• Channels: release (13)
• Platforms: Windows (13)

8. undefined in JSTerm - 6 errors (1.4%)

Component:

• Primary: JSTerm

Affected:

• Channels: release (6)
• Platforms: Windows (6)

9. undefined in button - 6 errors (1.4%)

Component:

• Primary: button

Affected:

• Channels: release (6)
• Platforms: Windows (6)

10. InternalError in HTMLPreview - 6 errors (1.4%)

Component:

• Primary: HTMLPreview

Error location:

#updatePreview@resource://devtools/client/netmonitor/src/components/previews/HtmlPreview.js:62:41

Affected:

• Channels: release (6)
• Platforms: Windows (4), Darwin (2)

Top Error Types Summary

1. TypeError in ConsoleSettings - 158 occurrences (37.4%)
2. TypeError in EvaluationContextSelector - 40 occurrences (9.5%)
3. TypeError in HTMLPreview - 33 occurrences (7.8%)
4. InternalError in ResponsePanel - 26 occurrences (6.2%)
5. undefined in RequestListContentComponent - 23 occurrences (5.5%)
6. TypeError in MenuButton - 16 occurrences (3.8%)
7. undefined in Connect(MonitorPanel) - 13 occurrences (3.1%)
8. undefined in JSTerm - 6 occurrences (1.4%)
9. undefined in button - 6 occurrences (1.4%)
10. InternalError in HTMLPreview - 6 occurrences (1.4%)

Actionable Insights

• 1. TypeError in ConsoleSettings accounts for 37.4% of all errors (158 occurrences)
• 2. release channel dominance: 95.7% of errors are from release
• 3. Platform-specific: InternalError in ResponsePanel is predominantly on Windows (21/26 errors)

Recommendations

Priority 1: TypeError in ConsoleSettings

• File location: devtools/client/framework/toolbox.js:616:5
• Impact: 37.4% of all errors

Priority 2: TypeError in EvaluationContextSelector

• File location: devtools/client/fronts/targets/worker.js:35:5
• Impact: 9.5% of all errors

Priority 3: TypeError in HTMLPreview

• File location: gre/modules/RemoteWebNavigation.sys.mjs:41:5
• Impact: 7.8% of all errors

Priority 4: InternalError in ResponsePanel

• File location: devtools/client/netmonitor/src/utils/request-utils.js:719:51
• Impact: 6.2% of all errors

Priority 5: undefined in RequestListContentComponent

• Impact: 5.5% of all errors

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DevTools Toolbox Component (React) Errors (7-day analysis)

422 errors recorded from 2026-04-10 07:25 to 2026-06-28 23:51. Top issues: TypeError in ConsoleSettings (158 errors), TypeError in EvaluationContextSelector (40 errors), TypeError in HTMLPreview (33 errors). release channel represents 95.7% of errors. Windows accounts for 74.6% of errors.